To Determine Specific Heat Capacity of a Given Solid by Method of Mixtures Viva Questions with Answers

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The specific heat capacity (symbol c) of a substance is the heat capacity of a sample of the substance divided by its mass, also known as massic heat capacity or specific heat.

It is the quantity of heat that must be supplied to one unit of mass of the substance to create a temperature rise of one unit.
Specific heat capacity is measured in joules per kelvin per kilogram (J kg^-1 K^-1).
The heat required to increase the temperature of 1 kilogram of water by 1 K, for example, is 4184 joules, hence the specific heat capacity of water is 4184 J kg^-1K^-1.
Calorimetry is the study or act of monitoring changes in a body's state variables in order to calculate the heat transfer associated with changes in its state caused by chemical processes, physical changes, or phase transitions under defined constraints.
A calorimeter is used to perform calorimetry.
A calorimeter is a device used to measure the heat produced during a mechanical, electrical, or chemical reaction and to calculate the heat capacity of materials.

Ques. What is calorimetry?

Ans. Calorimetry is the study of determining the energy changes of a system by measuring the heat exchanged with its surroundings. In other terms, it is the quantity of heat emitted or absorbed during a chemical reaction, state change, or solution formation.

Ques. State the principle of calorimetry.

Ans. According to the principle of calorimetry (or the principle of mixing), in an insulated system, the heat energy lost by the hot body equals the heat energy acquired by the cool body.

Ques. What is the heat?

Ans. The thermal energy transmitted between systems as a result of a temperature differential is referred to as heat. Heat is sometimes used casually to refer to thermal energy. The kinetic energy of vibrating and colliding atoms in a material is referred to as thermal energy.

Ques. Define heat capacity.

Ans. Heat capacity, often known as thermal capacity, is a characteristic of matter defined as the amount of heat required to change the temperature of a substance by one unit. The joule per kelvin is the SI unit of heat capacity.

Ques. What is specific heat capacity?

Ans. The specific heat capacity of a body is the amount of heat energy required to increase the temperature of a unit mass of that body through 1 ℃ (or 1K).

Ques. What is the formula to calculate specific heat capacity?

Ans. The formula to calculate specific heat capacity is given by

\(S = \frac{\Delta Q}{\Delta T \times m}\)

Where

S is the specific heat capacity
ΔQ is the amount of supplied heat energy
ΔT is the rise in the temperature of the body
m is the mass of the body

Ques. What is the specific heat capacity of water?

Ans. The specific heat capacity of liquid at normal temperature and pressure is approximately 4.2 J/g°C. This means that raising 1 gram of water by 1 degree Celsius requires 4.2 joules of energy.

Ques. Why is a calorimeter made of copper used in the experiment?

Ans. Copper has a relatively low specific heat. Heat absorption and liberation will be reduced during heat transmission.

Ques. What are the parameters on which heat capacity depends?

Ans. Heat capacity is not constant and is affected by variables such as volume, temperature, and pressure.

Ques. What is the International System of Units (SI) of specific heat capacity?

Ans. Specific heat capacity is measured in joules per kelvin per kilogram (J/kgK), J K-1 kg-1. Because a temperature increase of one degree Celsius equals a temperature increase of one kelvin therefore the unit of specific heat capacity can also be given by, the joule per degree Celsius per kilogram (J/kg°C).

Ques. What is a Hypsometer?

Ans. A hypsometer is a device for measuring atmospheric pressure at a station by detecting the boiling point of a liquid. The Clapeyron-Clausius equation describes the relationship between a liquid's boiling point and atmospheric pressure.

Ques. Define the heat capacity of copper.

Ans. Copper has a specific heat capacity of 0. 4 J g-1 K-1, which means that it takes 0. 4 Joules of heat energy to increase the temperature of one gram of copper by one kelvin.

Ques. Is the heat loss seen in conduction, convection, and radiation?

Ans. Yes, the heat loss is seen in conduction, convection, and radiation.

Ques. Is heat gained always equal to the heat lost?

Ans. If there is no chemical reaction taking place between the components then heat loss will be always equal to the heat gain.

Ques. What are the sources of error in this experiment?

Ans. The sources of error are

Heat loss may occur while placing the solid into the calorimeter.
Heat loss may occur through conduction, convection, and radiation.
The thermometer's bulbs may not be entirely within the solid.

Ques. What are the materials required in this experiment?

Ans. The materials required are

A hypsometer
Solid in small pieces
Calorimeter
Balance
Stirrer
A lid and outer jacket
Coldwater
Clamp stand
Weight box
Two half-degree thermometers

Ques. Can specific heat be negative zero or infinity?

Ans. Specific heat of gas can be positive, negative, or zero in between o to ∞.

Ques. Why specific heat is different for different substances?

Ans. Because every substance has a different mass, the only variable when the quantity of heat and temperature change is held constant is the mass. Because mass is the only variable, substances with different masses will have different specific temperatures. For the same reason that various compounds have varying melting and boiling temperatures, different substances have variable specific heat capacities. When the bonds between atoms are stronger, it takes more energy to heat up a substance.

Ques. Explain how to find the specific heat of a mixture.

Ans. Because specific heat capacity is also the heat capacity of a material per unit mass, the average specific heat capacity is calculated by dividing the total heat capacity by the total mass of the material. The energy balance equation for mixtures is explained easily.

Ques. Can the heat of the gas have a negative value?

Ans. Yes, negative specific heat indicates that heat is released (Q -ve) as the temperature rises (T +ve). This occurs in the case of saturated vapor because the specific heat of saturated vapor is negative. Negative heat capacity occurs when a system loses energy and its temperature increases.

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To Determine Specific Heat Capacity of a Given Solid by Method of Mixtures Viva Questions with Answers

Previous Year Questions

CBSE CLASS XII Related Questions

3.
A parallel plate capacitor has plate area \( A \) and plate separation \( d \). Half of the space between the plates is filled with a material of dielectric constant \( K \) in two ways as shown in the figure. Find the values of the capacitance of the capacitors in the two cases.

4.
Two point charges \( q_1 = 16 \, \mu C \) and \( q_2 = 1 \, \mu C \) are placed at points \( \vec{r}_1 = (3 \, \text{m}) \hat{i}\) and \( \vec{r}_2 = (4 \, \text{m}) \hat{j} \). Find the net electric field \( \vec{E} \) at point \( \vec{r} = (3 \, \text{m}) \hat{i} + (4 \, \text{m}) \hat{j} \).

6.
A current carrying circular loop of area A produces a magnetic field \( B \) at its centre. Show that the magnetic moment of the loop is \( \frac{2BA}{\mu_0} \sqrt{\frac{A}{\pi}} \).

Similar Physics Concepts

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To Determine Specific Heat Capacity of a Given Solid by Method of Mixtures Viva Questions with Answers

Previous Year Questions

CBSE CLASS XII Related Questions

3.A parallel plate capacitor has plate area \( A \) and plate separation \( d \). Half of the space between the plates is filled with a material of dielectric constant \( K \) in two ways as shown in the figure. Find the values of the capacitance of the capacitors in the two cases.

4.Two point charges \( q_1 = 16 \, \mu C \) and \( q_2 = 1 \, \mu C \) are placed at points \( \vec{r}_1 = (3 \, \text{m}) \hat{i}\) and \( \vec{r}_2 = (4 \, \text{m}) \hat{j} \). Find the net electric field \( \vec{E} \) at point \( \vec{r} = (3 \, \text{m}) \hat{i} + (4 \, \text{m}) \hat{j} \).

6.A current carrying circular loop of area A produces a magnetic field \( B \) at its centre. Show that the magnetic moment of the loop is \( \frac{2BA}{\mu_0} \sqrt{\frac{A}{\pi}} \).

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

3.
A parallel plate capacitor has plate area \( A \) and plate separation \( d \). Half of the space between the plates is filled with a material of dielectric constant \( K \) in two ways as shown in the figure. Find the values of the capacitance of the capacitors in the two cases.

4.
Two point charges \( q_1 = 16 \, \mu C \) and \( q_2 = 1 \, \mu C \) are placed at points \( \vec{r}_1 = (3 \, \text{m}) \hat{i}\) and \( \vec{r}_2 = (4 \, \text{m}) \hat{j} \). Find the net electric field \( \vec{E} \) at point \( \vec{r} = (3 \, \text{m}) \hat{i} + (4 \, \text{m}) \hat{j} \).

6.
A current carrying circular loop of area A produces a magnetic field \( B \) at its centre. Show that the magnetic moment of the loop is \( \frac{2BA}{\mu_0} \sqrt{\frac{A}{\pi}} \).